mirror of https://github.com/CGAL/cgal
<CGAL/draw_face_graph.h>
That factorizes the code for the `draw()` function for `Polyhedron_3` and `Surface_mesh`.
This commit is contained in:
Laurent Rineau
parent
6991fd1a01
commit
6ebe6d6845
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@ -0,0 +1,183 @@
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// Copyright (c) 2018-2020 GeometryFactory (France)
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Guillaume Damiand <guillaume.damiand@liris.cnrs.fr>
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// Laurent Rineau <laurent.rineau@cgal.org>
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#ifndef CGAL_DRAW_FACE_GRAPH_H
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#define CGAL_DRAW_FACE_GRAPH_H
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#ifdef CGAL_USE_BASIC_VIEWER
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#include <CGAL/Polygon_mesh_processing/compute_normal.h>
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#include <CGAL/Dynamic_property_map.h>
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#include <CGAL/Random.h>
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namespace CGAL
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{
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// Default color functor; user can change it to have its own face color
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struct DefaultColorFunctorFaceGraph
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{
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template<typename Graph>
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CGAL::Color operator()(const Graph&,
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typename boost::graph_traits<Graph>::face_descriptor fh) const
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{
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if (fh==boost::graph_traits<Graph>::null_face()) // use to get the mono color
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return CGAL::Color(100, 125, 200); // R G B between 0-255
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return get_random_color(CGAL::get_default_random());
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}
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};
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class SimpleFaceGraphViewerQt : public Basic_viewer_qt
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{
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using Base = Basic_viewer_qt;
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public:
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SimpleFaceGraphViewerQt(QWidget* parent) :
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Base(parent, "", false, true, true, true, false),
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m_compute_elements_impl([]{})
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{
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}
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/// Construct the viewer.
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/// @param amesh the surface mesh to view
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/// @param title the title of the window
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/// @param anofaces if true, do not draw faces (faces are not computed; this can be
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/// usefull for very big object where this time could be long)
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template <typename SM>
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SimpleFaceGraphViewerQt(QWidget* parent,
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const SM& amesh,
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const char* title="Basic Surface_mesh Viewer",
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bool anofaces=false) :
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SimpleFaceGraphViewerQt(parent, amesh, title, anofaces, DefaultColorFunctorFaceGraph())
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{
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}
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template <typename SM, typename ColorFunctor>
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SimpleFaceGraphViewerQt(QWidget* parent,
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const SM& amesh,
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const char* title,
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bool anofaces,
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ColorFunctor fcolor) :
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// First draw: no vertex; edges, faces; mono-color; inverse normal
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Base(parent, title, false, true, true, true, false),
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m_compute_elements_impl(compute_elements_functor(amesh, anofaces, fcolor))
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{
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}
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void init() override {
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compute_elements();
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Base::init();
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}
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void compute_elements() {
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m_compute_elements_impl();
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}
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template <typename SM, typename ColorFunctor>
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void set_face_graph(const SM& amesh,
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bool anofaces,
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ColorFunctor fcolor) {
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m_compute_elements_impl = compute_elements_functor(amesh, anofaces, fcolor);
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}
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template <typename SM, typename ColorFunctor>
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void set_face_graph(const SM& amesh,
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bool anofaces=false) {
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set_mesh(amesh, anofaces, DefaultColorFunctorFaceGraph());
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}
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protected:
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template <typename SM, typename ColorFunctor>
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std::function<void()>
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compute_elements_functor(const SM& sm,
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bool anofaces,
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ColorFunctor fcolor)
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{
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using Point =
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typename boost::property_map_value<SM, CGAL::vertex_point_t>::type;
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using Kernel = typename CGAL::Kernel_traits<Point>::Kernel;
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using Vector = typename Kernel::Vector_3;
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auto vnormals = get(CGAL::dynamic_vertex_property_t<Vector>(), sm);
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{
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// temporary face property map needed by `compute_normals`
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auto fpm = get(CGAL::dynamic_face_property_t<Vector>(), sm);
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CGAL::Polygon_mesh_processing::compute_normals(sm, vnormals, fpm);
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}
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// This function return a lambda expression, type-erased in a
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// `std::function<void()>` object.
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return [this, &sm, vnormals, anofaces, fcolor]()
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{
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this->clear();
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auto point_pmap = get(CGAL::vertex_point, sm);
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if (!anofaces)
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{
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for (auto fh: faces(sm))
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{
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if (fh!=boost::graph_traits<SM>::null_face())
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{
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CGAL::Color c=fcolor(sm, fh);
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face_begin(c);
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auto hd=halfedge(fh, sm);
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const auto first_hd = hd;
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do
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{
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auto v = source(hd, sm);
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add_point_in_face(get(point_pmap, v), get(vnormals, v));
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hd=next(hd, sm);
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}
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while(hd!=first_hd);
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face_end();
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}
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}
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}
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for (auto e: edges(sm))
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{
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add_segment(get(point_pmap, source(halfedge(e, sm), sm)),
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get(point_pmap, target(halfedge(e, sm), sm)));
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}
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for (auto v: vertices(sm))
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{
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this->add_point(get(point_pmap, v));
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}
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};
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}
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virtual void keyPressEvent(QKeyEvent *e)
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{
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// Test key pressed:
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// const ::Qt::KeyboardModifiers modifiers = e->modifiers();
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// if ((e->key()==Qt::Key_PageUp) && (modifiers==Qt::NoButton)) { ... }
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// Call: * compute_elements() if the model changed, followed by
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// * redraw() if some viewing parameters changed that implies some
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// modifications of the buffers
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// (eg. type of normal, color/mono)
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// * update() just to update the drawing
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// Call the base method to process others/classicals key
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Base::keyPressEvent(e);
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}
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protected:
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std::function<void()> m_compute_elements_impl;
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};
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} // End namespace CGAL
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#endif // CGAL_USE_BASIC_VIEWER
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#endif // CGAL_DRAW_SURFACE_MESH_H
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@ -1,4 +1,4 @@
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// Copyright (c) 2018 ETH Zurich (Switzerland).
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// Copyright (c) 2018-2020 ETH Zurich (Switzerland).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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@ -18,175 +18,12 @@
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#ifdef CGAL_USE_BASIC_VIEWER
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#include <CGAL/Polyhedron_3.h>
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#include <CGAL/draw_face_graph.h>
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#include <CGAL/Random.h>
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namespace CGAL
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{
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// Default color functor; user can change it to have its own face color
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struct DefaultColorFunctorPolyhedron
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{
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template<typename Polyhedron>
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static CGAL::Color run(const Polyhedron&,
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typename Polyhedron::Facet_const_handle fh)
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{
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if (fh==boost::graph_traits<Polyhedron>::null_face()) // use to get the mono color
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return CGAL::Color(100, 125, 200); // R G B between 0-255
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CGAL::Random random((unsigned int)(std::size_t)(&(*fh)));
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return get_random_color(random);
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}
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};
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// Viewer class for Polyhedron
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template<class Polyhedron, class ColorFunctor>
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class SimplePolyhedronViewerQt : public Basic_viewer_qt
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{
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typedef Basic_viewer_qt Base;
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typedef typename Polyhedron::Traits Kernel;
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typedef typename Polyhedron::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Polyhedron::Vertex_const_handle Vertex_const_handle;
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typedef typename Polyhedron::Facet_const_handle Facet_const_handle;
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public:
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/// Construct the viewer.
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/// @param apoly the polyhedron to view
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/// @param title the title of the window
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/// @param anofaces if true, do not draw faces (faces are not computed; this can be
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/// usefull for very big object where this time could be long)
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SimplePolyhedronViewerQt(QWidget* parent,
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const Polyhedron& apoly,
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const char* title="Basic Polyhedron Viewer",
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bool anofaces=false,
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const ColorFunctor& fcolor=ColorFunctor()) :
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// First draw: no vertex; edges, faces; mono-color; inverse normal
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Base(parent, title, false, true, true, true, false),
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poly(apoly),
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m_nofaces(anofaces),
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m_fcolor(fcolor)
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{
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compute_elements();
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}
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protected:
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void compute_face(Facet_const_handle fh)
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{
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CGAL::Color c=m_fcolor.run(poly, fh);
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face_begin(c);
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Halfedge_const_handle he=fh->facet_begin();
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do
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{
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add_point_in_face(he->vertex()->point(),
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get_vertex_normal(he));
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he=he->next();
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}
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while (he!=fh->facet_begin());
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face_end();
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}
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void compute_edge(Halfedge_const_handle he)
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{
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add_segment(he->vertex()->point(),
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he->opposite()->vertex()->point());
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// We can use add_segment(p1, p2, c) with c a CGAL::Color to add a colored segment
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}
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void compute_vertex(Vertex_const_handle vh)
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{
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add_point(vh->point());
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// We can use add_point(p, c) with c a CGAL::Color to add a colored point
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}
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void compute_elements()
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{
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clear();
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if (!m_nofaces)
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{
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for(typename Polyhedron::Facet_const_iterator f=poly.facets_begin();
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f!=poly.facets_end(); f++)
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{
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if (f!=boost::graph_traits<Polyhedron>::null_face())
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{ compute_face(f); }
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}
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}
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for ( typename Polyhedron::Halfedge_const_iterator e=poly.halfedges_begin();
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e!=poly.halfedges_end(); ++e)
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{
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if (e<e->opposite())
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{ compute_edge(e); }
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}
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for ( typename Polyhedron::Vertex_const_iterator v=poly.vertices_begin();
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v!=poly.vertices_end(); ++v)
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{ compute_vertex(v); }
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}
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virtual void keyPressEvent(QKeyEvent *e)
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{
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// Test key pressed:
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// const ::Qt::KeyboardModifiers modifiers = e->modifiers();
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// if ((e->key()==Qt::Key_PageUp) && (modifiers==Qt::NoButton)) { ... }
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// Call: * compute_elements() if the model changed, followed by
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// * redraw() if some viewing parameters changed that implies some
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// modifications of the buffers
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// (eg. type of normal, color/mono)
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// * update() just to update the drawing
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// Call the base method to process others/classicals key
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Base::keyPressEvent(e);
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}
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protected:
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Local_vector get_face_normal(Halfedge_const_handle he)
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{
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Local_vector normal=CGAL::NULL_VECTOR;
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Halfedge_const_handle end=he;
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unsigned int nb=0;
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do
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{
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internal::newell_single_step_3
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(this->get_local_point(he->vertex()->point()),
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this->get_local_point(he->next()->vertex()->point()),
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normal);
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++nb;
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he=he->next();
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}
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while (he!=end);
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assert(nb>0);
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return (typename Local_kernel::Construct_scaled_vector_3()(normal, 1.0/nb));
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}
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Local_vector get_vertex_normal(Halfedge_const_handle he)
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{
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Local_vector normal=CGAL::NULL_VECTOR;
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Halfedge_const_handle end=he;
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do
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{
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if (!he->is_border())
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{
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Local_vector n=get_face_normal(he);
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normal=typename Local_kernel::Construct_sum_of_vectors_3()(normal, n);
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}
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he=he->next()->opposite();
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}
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while (he!=end);
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if (!typename Local_kernel::Equal_3()(normal, CGAL::NULL_VECTOR))
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{ normal=(typename Local_kernel::Construct_scaled_vector_3()
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(normal, 1.0/CGAL::sqrt(normal.squared_length()))); }
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return normal;
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}
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protected:
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const Polyhedron& poly;
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bool m_nofaces;
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const ColorFunctor& m_fcolor;
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};
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// Specialization of draw function.
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#define CGAL_POLY_TYPE CGAL::Polyhedron_3 \
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<PolyhedronTraits_3, PolyhedronItems_3, T_HDS, Alloc>
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@ -211,9 +48,8 @@ void draw(const CGAL_POLY_TYPE& apoly,
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int argc=1;
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const char* argv[2]={"polyhedron_viewer","\0"};
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QApplication app(argc,const_cast<char**>(argv));
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DefaultColorFunctorPolyhedron fcolor;
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SimplePolyhedronViewerQt<CGAL_POLY_TYPE, DefaultColorFunctorPolyhedron>
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mainwindow(app.activeWindow(), apoly, title, nofill, fcolor);
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SimpleFaceGraphViewerQt
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mainwindow(app.activeWindow(), apoly, title, nofill);
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mainwindow.show();
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app.exec();
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}
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@ -1,4 +1,4 @@
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// Copyright (c) 2018 GeometryFactory (France)
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// Copyright (c) 2018-2020 GeometryFactory (France)
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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@ -36,168 +36,10 @@ void draw(const SM& asm);
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#ifdef CGAL_USE_BASIC_VIEWER
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#include <CGAL/Surface_mesh.h>
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#include <CGAL/Random.h>
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#include <CGAL/draw_face_graph.h>
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namespace CGAL
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{
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// Default color functor; user can change it to have its own face color
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struct DefaultColorFunctorSM
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{
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template<typename SM>
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CGAL::Color operator()(const SM&,
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typename SM::Face_index fh) const
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{
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if (fh==boost::graph_traits<SM>::null_face()) // use to get the mono color
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return CGAL::Color(100, 125, 200); // R G B between 0-255
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CGAL::Random random((unsigned int)fh);
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return get_random_color(random);
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}
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};
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class SimpleSurfaceMeshViewerQt : public Basic_viewer_qt
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{
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using Base = Basic_viewer_qt;
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public:
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/// Construct the viewer.
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/// @param amesh the surface mesh to view
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/// @param title the title of the window
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/// @param anofaces if true, do not draw faces (faces are not computed; this can be
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/// usefull for very big object where this time could be long)
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template <typename SM>
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SimpleSurfaceMeshViewerQt(QWidget* parent,
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const SM& amesh,
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const char* title="Basic Surface_mesh Viewer",
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bool anofaces=false)
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: SimpleSurfaceMeshViewerQt(parent, amesh, title, anofaces, DefaultColorFunctorSM())
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{
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}
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template <typename SM, typename ColorFunctor>
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SimpleSurfaceMeshViewerQt(QWidget* parent,
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const SM& amesh,
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const char* title,
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bool anofaces,
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ColorFunctor fcolor) :
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// First draw: no vertex; edges, faces; mono-color; inverse normal
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Base(parent, title, false, true, true, true, false),
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m_compute_elements_impl(compute_elements_functor(amesh, anofaces, fcolor))
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{
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}
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void init() override {
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compute_elements();
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Base::init();
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}
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void compute_elements() {
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m_compute_elements_impl();
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}
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template <typename SM, typename ColorFunctor>
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void set_mesh(const SM& amesh,
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bool anofaces=false,
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ColorFunctor fcolor=DefaultColorFunctorSM()) {
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m_compute_elements_impl = compute_elements_functor(amesh, anofaces, fcolor);
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redraw();
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}
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protected:
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template <typename SM, typename ColorFunctor>
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std::function<void()>
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compute_elements_functor(const SM& sm,
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bool anofaces,
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ColorFunctor fcolor)
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{
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using Point = typename SM::Point;
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using Kernel = typename CGAL::Kernel_traits<Point>::Kernel;
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using Vector = typename Kernel::Vector_3;
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auto vnormals = get(CGAL::dynamic_vertex_property_t<Vector>(), sm);
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{
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// temporary face property map needed by `compute_normals`
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auto fpm = get(CGAL::dynamic_face_property_t<Vector>(), sm);
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CGAL::Polygon_mesh_processing::compute_normals(sm, vnormals, fpm);
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}
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// This function return a lambda expression, type-erased in a
|
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// `std::function<void()>` object.
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return [this, &sm, vnormals, anofaces, fcolor]()
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{
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this->clear();
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|
||||
if (!anofaces)
|
||||
{
|
||||
for (typename SM::Face_range::iterator f=sm.faces().begin();
|
||||
f!=sm.faces().end(); ++f)
|
||||
{
|
||||
if (*f!=boost::graph_traits<SM>::null_face())
|
||||
{ this->compute_face(sm, vnormals, *f, fcolor); }
|
||||
}
|
||||
}
|
||||
|
||||
for (typename SM::Edge_range::iterator e=sm.edges().begin();
|
||||
e!=sm.edges().end(); ++e)
|
||||
{ this->compute_edge(sm, *e); }
|
||||
|
||||
for (typename SM::Vertex_range::iterator v=sm.vertices().begin();
|
||||
v!=sm.vertices().end(); ++v)
|
||||
{ this->compute_vertex(sm, *v); }
|
||||
};
|
||||
}
|
||||
|
||||
template <typename SM, typename VNormals, typename face_descriptor, typename ColorFunctor>
|
||||
void compute_face(const SM& sm, VNormals vnormals,
|
||||
face_descriptor fh, const ColorFunctor& fcolor)
|
||||
{
|
||||
CGAL::Color c=fcolor(sm, fh);
|
||||
face_begin(c);
|
||||
auto hd=sm.halfedge(fh);
|
||||
do
|
||||
{
|
||||
auto v = sm.source(hd);
|
||||
add_point_in_face(sm.point(v), get(vnormals, v));
|
||||
hd=sm.next(hd);
|
||||
}
|
||||
while(hd!=sm.halfedge(fh));
|
||||
face_end();
|
||||
}
|
||||
|
||||
template <typename SM, typename edge_descriptor>
|
||||
void compute_edge(const SM& sm, edge_descriptor e)
|
||||
{
|
||||
add_segment(sm.point(sm.source(sm.halfedge(e))),
|
||||
sm.point(sm.target(sm.halfedge(e))));
|
||||
}
|
||||
|
||||
template <typename SM, typename vertex_descriptor>
|
||||
void compute_vertex(const SM& sm, vertex_descriptor vh)
|
||||
{ add_point(sm.point(vh)); }
|
||||
|
||||
|
||||
virtual void keyPressEvent(QKeyEvent *e)
|
||||
{
|
||||
// Test key pressed:
|
||||
// const ::Qt::KeyboardModifiers modifiers = e->modifiers();
|
||||
// if ((e->key()==Qt::Key_PageUp) && (modifiers==Qt::NoButton)) { ... }
|
||||
|
||||
// Call: * compute_elements() if the model changed, followed by
|
||||
// * redraw() if some viewing parameters changed that implies some
|
||||
// modifications of the buffers
|
||||
// (eg. type of normal, color/mono)
|
||||
// * update() just to update the drawing
|
||||
|
||||
// Call the base method to process others/classicals key
|
||||
Base::keyPressEvent(e);
|
||||
}
|
||||
|
||||
protected:
|
||||
std::function<void()> m_compute_elements_impl;
|
||||
};
|
||||
|
||||
// Specialization of draw function.
|
||||
template<class K>
|
||||
void draw(const Surface_mesh<K>& amesh,
|
||||
|
|
@ -215,7 +57,7 @@ void draw(const Surface_mesh<K>& amesh,
|
|||
int argc=1;
|
||||
const char* argv[2]={"surface_mesh_viewer","\0"};
|
||||
QApplication app(argc,const_cast<char**>(argv));
|
||||
SimpleSurfaceMeshViewerQt mainwindow(app.activeWindow(), amesh, title,
|
||||
SimpleFaceGraphViewerQt mainwindow(app.activeWindow(), amesh, title,
|
||||
nofill);
|
||||
mainwindow.show();
|
||||
app.exec();
|
||||
|
|
|
|||
Loading…
Reference in New Issue